WD  My Book World Edition 1 TB Network Attached Storage Automatic and continuous backup for all the computers on your network Centralize all your family's digital content Best-in-class performance cutting-edge technologies to deliver high performance read and write speeds ideal for the most demanding users. Built-in media server for streaming music, photos and movies to any DLNA certified multimedia device iTunes server support Centralize your music collection and stream to a Mac or Windows PC using iTunes software